Machine for making concrete roadways



May 22, 1928.

A. E. SCHUTTE MACHINE EQRl MAKING CONCRETE ROADWAYS 4 Sheets-Sheet May 22, 1928.,

A. E. SCHUTTE MACHINE FOR MAKING CONCRETE ROAWAYS Filed May 29, 1924 4 Sheets-Sheet 2 May 22, 1928.

- A. E. SCHUTTE 4 Sheets-She'et 55l Filed May 29,- 1924 May 2v2, 1928.

A. E. SCHUTTE MACHINE FOR MAKING CONCRETE ROADWAYS 4 Sheets-Sheet 4 Filed May 29, 1924 Vla Patented May 22, 1928.

UNITED STTE navegas AUGUST n. scno'r'rn, or

=- SSACHUSETTS, ASSIQNQB TO *l Il WEST VIRGINIA.

MACHINE FOB OAYS. I

Application med Kay W, l serial No. 71%,

My improvement relates to machines more especially adapted to be uz-ed in layingconcrete and finishing concrete. roadwa s and i foundations, i. e. for pavement whet er for use by vehicles or by walkers. In the methods heretofore used in aving such roadwa s tamping, screedin'g or lting have been t e common methods-of settling and binding the concrete into place. 'ramping-especially results in'bringing the mortar, the water and the cement vwhich float up with it to the surface of the layer of concrete so that the lar er stone which should take the wear of tra e is scarcely exposed to such wear, but is covered by a more or less thin coating of cement and Sandor small stones; and when thoroughly set this soft mixture soon chips oi leaving a; rough uneven wearing surface which offers new sources of disintegration. i My invention is a machine for finishing a concrete surface and is so constructed as to do this intermittently and progressively so thatwhile but a small portion of the surface is acted upon at a time, the arrangement of its finishing members is such that la longitudinal wiping pressure is given to the entire surface piecemeal to drive the larger stone into place without crushing and push out of theway surplus material, thus giving an intermittent and rogressive ressure so that the lar particles are force into place and fitted together with a more orl less contacting relation to each other leavin a minimum amount of mort-ar between t em and on the surface and permitting a great deal drier mixture to be used, thus not only binding the particles closer together, but elimihating to a considerable extent the air cells which are left by the evaporated water. It is well known that the less Water used in mixing concrete (i. e. the drier the mixture), the denser, stronger and more uniform it will be. The wetter the mixture, the more se tion.

t is obvious that this machine and process can he equally well applied to bituminous and, other plastic mixtures, in which case the mortar ma be a bituminous or other cement which xs in a lastic dition at the time when the leveling and compressin machine is ap lied. i

y invention wi l be understood by reference to the drawings in which it is Shown in its preferred' .fom

v cross section.

-drive the car.

Figure l is a plan of the machine embodying my invention;

Fig. 2 being a side view thereof, the en gine being omitted. i

Fig. 3 is a section on line 3--3 of Fig. 1. Fig. 4 is a section on line 4 4 of Fig. 1, showing the finisher.

Figs. 5 to 8 are details described below. Fig. 9 is asection on line 9-9 of Fig. 1, showing diagrammatically the relative arrangements of the various wipersof the finisher. f Figs. wand 1l are diagrammatic views showing a way of supporting the apparatus in operation.' .l

Mymachme compris a car having a yframe the side portions of which are numbered l and le, the end portions 2 and 2 .and its braces 21 and. 21, these several parts being of any convenient'size and shape in v The trame is su ported on four wheels a, the axles 4, 41 o which extend across the car and are journaled in bearings 3, 31, mounted on the under side of theside beams 1, 1B. 5 is a motor of any suitable. character having a power shaft 6# carryinga. sprocket wheel, 7 which is connected by a sprocket chain 8 running around a sprocket wheel 9 on the end of the tnisher shaft 10. By this means the shaft 10 and the finisher are iven a continuous rotation.

Power is app :ed tomove the car as fol lows: At the further end oxthe nisher shaft 10is a spiral gear 15. From the side of the side frame l project brackets 12' in each o'which is mounted a shaft 13, 14. The shaft 13 carries a spiral gear 11 meshing with the s irai gear 15. The shaft 14 has at its urt er end a worm 16 meshing with the Worm gear l? on the end of the shaft 4L The shafts 13 and 14 are connected hy a clutch 18 ,operated by a handle lever 19 in a usual This construction is such that when te members of the clutch 18 are engaged-power will betransmitted from the shaft 10 through the shafts 13 and la to the shaft 41 to give power to When the clutch members are disend, as by means of the lever 19, the shafts are diseonneeted and power to drive the car will he shut o. These parts are so construe and arr :l :.1 f that the nisher and the car wheels are revolved in diereat directions.

its'

The motor 5 is of such construction that the machine may be driven either forward or rearward as desired.

At the front end of the machine there are mounted graders which as shown comprise four scrapers preferably attached togcther` of which the scraper 2() is bolted both to the side beam-1 and a brace 21. 'lhe scraper 22 is bolted also to the brace 21 and its outer end is strapped as shown at 52:23 or connected in any convenient way to the scraper :23 which in turn is bolted to the brace 2l. 'lhe scraper :21 is bolted both to the brace'll and the frame 1. )It will be noted `that these scrapcrs are arranged at an angle to each other and that the outer scrapers :2U and 24 art-'placed to guide the materialwhich muy strike them in ageneral direction to keep all such within reach of the tinisher.

In order to adjust the height of these scrapers, the bolts :3.3 by which they are attached to the frame, etc. pass down through the frame andthrough collars 27, lone on each side of the, frame, and into threaded castings .26 mounted on the scrapers. The collars 27 are attached to the bolts 25 so that in the rotation of tl1e bolts their posi'- tion with relation to the frame will'not be changed, but as they are turned the Scrapers may v lifted or lowered as occasion may require (see Fig. 3

'Ihe finisher, which is the important element in this machine, comprises a series of wipers 31 mounted to wipe the upper surface of the graded concrete so as to press into place all the material possible and push forward and generally downward other ma terial in front of them by a wi ing action which shall leave a smooth sur ace behind them.'v

As shown these wipers are each preferably mounted on the periphery of a disk 28 at the greatest distance from its axis. These disks are of the same diameter and are mounted eccentrically on the shaft and keyed thereto by a key or keys 29 so that they will be rotated positivel b the shaft. Each wiper 31 is preferab y o steel and is mounted on that part of the periphery of the disk which will touch the concrete. These disks 28 are in pairs and the two members of each pair are so placed with relation to each other that their wiping part is approximately 180 degrees from each other and each pair is staggered on the shaft with relation to the next pair. In Figs. 7 and,8 two pairs of disks are shown and the pairs of disks in Figs. 7' are at a slight angle to those in Fig. v8. In each disk there is a hole 29 to receive the shaft, which hole has a key seat to receive the ke 29.

The machine` in the rawings shows two sets of pairs of disks 28 on the same shaft 10, each set running from the centre to the end of-the shaft. This will be apparent by comparing Figs. 1 and 4 where there are shown 36 disks, 1.8 in a set. In Fig. 1 the two end disks are in similar positions. `This is a good arrangement for a machine say nine feety wide, but other arrangements may be used. In no two disks of the same set are the holes 32 and key, seats 40 in the same .part of the disk. There is enough variation in their positions to bring the wipers in propel' relation to each other.

- Each wiper 31 is wider than its disk so that as shown in Fig. 6 it extends lat-eral] a-short distance on cach side of thedisk' to overlap the joint between each disk` and the next one to it and this not only preventsl the fine particles of concrete ,from getting into the cracks between adjacent disks, but also secures a better vconcrete surface.

In order that the car may be made to go around a curve, provision is made for ad- 'usting the angle of the front axle 4 to the ody of the car. For this purpose the bearings 3 are slidably attached to the hangers '3". Each bearing has a socket piece 33 mounted thereon and a screw 34 which passes through threaded collars 32 on said hangers, and ahandle 35 is also provided, one end of the screw being fastened in an suitable manner in the socket\33so that t e end of the screw will be held therein, but allowed to turn, the otherend of the screw carrying the handle 35. It will be seen that by turning the handle 35 the corresponding end accordineP to the direction in `which it is passed allong the road. The graders may also be yadjusted verticali ifv required by circumstances, and the mac me may be stopped at any moment by disconnecting theshafts 13 and'14 by means of the clutch 18.

Preferably and as shown, thebearing wheels a are provided with two flanges so as to straddle a rail 40, and in practice two rails, preferably channel iron, are first laid and spiked one on each side of the space to be covered with concrete and preferably these rails are laid `so that their tops are approximately the thickness of the concrete above the foundation, and serve as side or retaining Walls to prevent the coucrete as it is being laid from spreading beyond, the reach of the machine. A length of these rails, say a few hundred feet, is first laid on the roadbed or foundation and preflao 1 Ill i follows the erably tie bolts 41 are used to connect them together at suitable points,'the tie bolts bcing removed from time to time ahead ofthe car and after the concrete has setinore or less the spikes and rails are removed for use elsewhere. The machine as a whole is made approximately the width of the surface to be concreted, which is usuallyk about nine feet, and if the finished concrete surface is'to be very wide, a single rail 4:0 on the outside edge of the second strip and the finished edge of the roadbed are used to support the inner wheels, which in this case are ordinary unfianged wheels (see Fig. 11).

To lay a roadway with this machine, a guantity of concrete is dumped in iles in ront of the gradersand the mac ine is started up. The properly adjusted graders .being in front level off the piles and spread 'the concrete, the surplus material being kept between the rails on which the car travels. The next action is that of the wipers 31 on the finishing roll which finishes, compresses and wipes off the concrete, and immediately rading action. A s lis stated above, this ro l comprises a series of wipers which overlap in their action and being staggered about the shaft 10, as each wiper wipes ,the surface, the-wiper of the next disk is approaching. the surface and takes up the wiping operation where the adjoining wiper has left it. The shaft carryingy these wipers is rotated in the opposite directionl to that of the car wheels so that each wiper pushes forward longitudinally the surp us material in front of it 'and leaves a wiped surface behind it, compressing the stone aggregate of the concrete with which. it contacts intoplacecausing it to push the adjacent material out of the way. vThus a place is made for the stone between its neighbors, and the wi 'ing action smoothing 0E the to surface of he concrete, the stones are thus rought into contact and cemented. together by the cement. The action of one -wiper is supplemented by the` action of the wiper next to it, which crowds down any stone which the first wiper has pushed out of its way as well as the material in front of it, the wipers, as stated above and as shown in-Fig. 6, overlapping somewhat so that the surface is left by the' finishing roll substantially smooth and with substantially no lines of*l demarcation to show where the several wipers have left their working pressure. l

A machine which has been constructed has worked well with disks eight inches in diameter and car wheels about ten inches in diameter and operated at a rate. of about.

1 and any roll to one rotation of the car wheels have been found to be eEective.

If -the weight of the car isvnot sutiicient` to give proper pressure to the concrete the car may he weighted in anyway as, for example, by a platform and rocks.

lt. is evident Athat my invention may be.

stone longitudinally down into place with a pressure which is applied to small areas yof plastic material at a time and almost immediately thereafter to adjacent areas so that the work progresses in sequence across the surface, and any portion of the material which is left unfinished at the side of one wiper is immediately compressed into place by the-next wiper.

In using the word longitudinally I mean in the direction in which the car is traveling.

I- use the word sense meaning a mineral aggregate cemented together b any suitable cement, non-bituminous or ituminous.

What I claim as my invention is:-

1. A machine to finish a plastic surface comprising a car and means for moving it and having finishing means mounted thereon, said finishing means comprisin a series concrete in its broad of rotary independent non-yieldab e wipers mounted side by side on the same axis and means for mounting and operating them whereby they will engage the surface of thel therefrom -movab e compacting means mounte thereon, said compacting means comprising a weighty finishin member whereby the material to be acte upon will be progressively compressed and wiped downward into place surplus material will simultaneously be wiped oli.

3. Avmachine of the kind described comprising a car having movable compacting means mounted thereon, said compacting means comprising a sectional rotary nishing member, said rotary member comprising a `rotary supporting member having a series of .wipers mounted in pairs progressively side. by side thereon in staggered relation to each other, whereby each in turn will com- 'press and wipe the surface of the material acted upon.

' s. A machine of the kind described comprising a car having-movable compacting means mounted thereon, said compacting means comprisi a sectional rotary finishing member, said rotary member comprising a rotary supporting member having a series of disks mounted eccentrical-ly side by sidef means mounted. thereon, said compacting means comprising a sectional rotary finishing means, said rotary means comprising a rotary supporting means havin a series of disks mounted eccentrically slde by side thereon in staggered relation, eachY disk having a shoe mounted on its periphery at (points each farthest from its axis of rotation an shoe being wider than the thickness of its disk, whereby each shoe in turn will compress the material with which it comes in .contact with wiping action and will overlap the work done by the shoes on each side -of it.

6. A concrete-road-nishing machine comprising a movable car and means for moving it, means for compacting the surface of the road and graders mounted on one end of said car, said graders comprising V-shaped members connected together at their adjacent.`

they will throw thev surplus material engaging them within the path of said `compacting means in combination with means for compacting said surplus material.

7. A concrete-road-fnishing machine comprising a' movable car and means for moving it, means for compacting the surface of the road and graders mounted on one end of said car, said graders comprising V-shaped members connected together at their adjacent ends having their outer portions advanced further from the frontline of the car than their inner portions, whereby in grading they will throw the surplus materialengaging them withinv the path .of said compacting means, and means for altering the evel of said graders in combination with means for compacting saidA surplus material.

.AUG-UST E. SCHUTTE. 

